Aluminum Rolling Mill ProcessAuthor : hani Time : 2019/10/08
The function of the aluminum rolling mill is to roll the original aluminum into a Cast-rolled alloy strip suitable for cold rolling. The molten aluminum must be supplied continuously. The melt of aluminum alloy must be clean and have the same chemical composition, and the liquid level and temperature must be constant.
The constant liquid surface between the furnace and the aluminum rolling mill is very important for the smooth operation of the rolling line. The liquid level is maintained constant by adjusting the outlet flow through a simple flow control device. Between the furnace and the rolling mill, two Al-Ti-B wires are inserted into the flume system. The wire is supplied by a titanium wire feeder at a preset constant speed. Pure liquid aluminum with constant liquid level and the temperature then flows into the front box of the casting and rolling mill. The unique 15-degree inclination angle of the rolling mill is combined with the precise control device in the front box, which allows the front box to supply liquid aluminum for the nozzle under extremely precise pressure. The molten aluminum can be injected into the roll cooled by cooling water through the nozzle. The molten aluminum distributes broadly along the roll surface, and then the molten aluminum can be cooled and solidified. At this time, the metal is slightly ahead of the roll gap in the middle line of the casting mill roll, and then hot rolled into shape. After hot rolling, the roll of cast aluminum is Cast-rolled strip.
Each roll of the aluminum rolling mill is driven by DC motor and planetary gear reducer, and synchronous control is carried out by an advanced digital control system. Graphite solution with separating and the lubricating effect is continuously sprayed on the surface of roll casting.
After leaving the gap of the roll, the strip of aluminum casting and rolling is continuously moved along the rolling line after deriving the roll. Finally, the strip is coiled by a coiler driven by a DC motor through a bias guide roll. The coiler can maintain the tension of the Cast-rolled strip. When the strip size meets the requirements, the strip must be sheared without stopping casting and rolling. In order to complete the operation of the casting and rolling mill, the system is equipped with a set of hydraulic-driven pinch rolls to maintain the tension at the exit of the casting and rolling mill. The pinch roll is clamped before shearing in the synchronous shearing machine and opens immediately after changing the roll.